[DataGrid] Row Grouping - column does not display its description / tooltip

[JuliaKnaeble]

[DataGrid] Row Grouping - column does not display its description / tooltip

[MBilalShafi]

That's because the rowGrouping column does have its own colDef properties which you can customize using the groupingColDef prop.

I tried to update your codesandbox to do that for one grouping column: https://codesandbox.io/s/lucid-parm-7jqzc2?file=/Demo.tsx:759-773 (Note that if you want to have a custom tooltip for multiple columns grouping you have to update the code accordingly)

You can see more details in these documentation sections:

• Custom grouping column
• Multiple grouping columns
• Row grouping (in general)

Let me know if this answers your concerns.

Thank You!

Sidenote: You should have stable references of the columns prop and groupingColDef prop to avoid unnecessary re-renders of the grid and have stable performance, I tried to memoize the objects in your example.

[JuliaKnaeble]

Thank you a lot, it works!
As the documentation for 'custom grouping column' says 'To customize the rendering of the grouping column, use the groupingColDef prop. You can override the headerName or any property of the GridColDef interface, ..'
Given the documentation, I assumed that all properties are available and using 'groupingColDef' will simply allow you to costomize / override properties.
Now, understanding the 'groupingColDef' prop, it seems to me more like it is used to add missing properties and allows manipulation.

[MBilalShafi]

Glad it worked!

Now, understanding the 'groupingColDef' prop, it seems to me more like it is used to add missing properties and allows manipulation.

Yes. The grouping column is not the same column as the actual column on the basis on which it's grouped, it's internally created and it has its own colDef which is defined inside the Grid, using groupingColDef you can override the default properties or add some optional ones.

Since you have the solution now, I'll go ahead and close the issue. Feel free to further clarify if you have more questions.